romney believes. there's a theme there that biden can work, which is the differences between the two. ryan has been quite specific in his career, the details of his specificity in the past are different from what romney believes now. if biden can exploit that and make it look like they're kind of fuzzing the numbers up and making it up as they go along and hiding their true intentions, that's really what the obama people are praying for in terms of a good outcome from this debate. >> john dickerson, thank you. >>> "fortune" magazine is out this morning with a new under-40 list. it ranks the top 40 innovators in various fields who are all under the age of, well, 40. mayo of yahoo is on the list, the youngest ceo. number two is mark zuckerberg, founder and ceo of facebook. the social network just hit 1 billion active users. and number one is larry page, co-founder and ceo of google, and his google partner, sergey brin, is also in the top five. and guess who else is on the list? we're feeling a little pr